**Exhibit      31.2 **

**CERTIFICATION      OF PERIODIC REPORT PURSUANT TO SECTION 302 OF THE SARBANES-OXLEY ACT OF 2002      **

| 1. | I                have reviewed this quarterly report on Form 10-Q of Keryx                Biopharmaceuticals, Inc.; |
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| 2. | Based                on my knowledge, this report does not contain any untrue statement                of a                material fact or omit to state a material fact necessary to make                the                statements made, in light of the circumstances under which such statements                were made, not misleading with respect to the period covered by this                report; |
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| 3. | Based                on my knowledge, the consolidated financial statements, and other                financial information included in this report, fairly present in                all                material respects the financial condition, results of operations                and cash                flows of the registrant as of, and for, the periods presented in                this                report; |
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| 4. | The                registrant’s other certifying officer and I are responsible for                establishing and maintaining disclosure controls and procedures (as                defined in Exchange Act Rules 13a-15(e) and 15d-15(e)) and internal                control over financial reporting (as defined in Exchange Act Rules                13a-15(f) and 15d-15(f)) for the registrant and have: |
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|  | a) | Designed                      such disclosure controls and procedures, or caused such disclosure                      controls and procedures to be designed under our supervision,                      to ensure                      that material information relating to the registrant, including                      its                      consolidated subsidiaries, is made known to us by others within                      those                      entities, particularly during the period in which this report                      is being                      prepared; |
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|  | b) | Designed                          such internal control over financial reporting, or caused                          such internal                          control over financial reporting to be designed under our                          supervision, to                          provide reasonable assurance regarding the reliability                          of financial                          reporting and the preparation of financial statements for                          external                          purposes in accordance with generally accepted accounting                          principles; |
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|  | c) | Evaluated                            the effectiveness of the registrant’s disclosure controls and procedures                            and presented in this report our conclusions about the                            effectiveness of                            the disclosure controls and procedures, as of the end                            of the period                            covered by this report based on such evaluation; and |
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|  | d) | Disclosed                              in this report any change in the registrant’s internal control over                              financial reporting that occurred during the registrant’s most recent                              fiscal quarter (the registrant’s fourth fiscal quarter in the case of an                              annual report) that has materially affected, or is                              reasonably likely to                              materially affect, the registrant’s internal control over financial                              reporting; and |
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| 5. | The                  registrant’s other certifying officer and I have disclosed, based on our                  most recent evaluation of internal control over financial reporting,                  to                  the registrant’s auditors and the audit committee of the registrant’s                  board of directors (or persons performing the equivalent functions): |
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|  | a) | All                            significant deficiencies and material weaknesses in the                            design or                            operation of internal control over financial reporting                            which are                            reasonably likely to adversely affect the registrant’s ability to record,                            process, summarize and report financial information;                            and |
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|  | b) | Any                              fraud, whether or not material, that involves management                              or other                              employees who have a significant role in the registrant’s internal control                              over financial reporting. |
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| Date:                    May 7, 2007 |                                                                                                                                                                                            | /s/ Ronald                  C.                  Renaud, Jr |
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|                                 | Ronald                      C. Renaud, JrSenior                      Vice President, Chief Financial Officer and                      TreasurerPrincipal                      Financial Officer |